Device for removing and replacing electric lamps.



A. W. DARBY.

DEVICE FOR REMOVING AND REPLACING ELECTRIC LAMPS.

APPLICATION FILED JUNE 1. 1915.

1.16%,19. Patented Dec. 28, 1915.

WITNESS A TTORNE Y.

ARTHUR W. DABBY,"0F HOLYOKE, MASSACHUSETTS.

' DEVICE FOR REMOVING-"AND REPLACING ELECTRIC LAMPS.

l Specification of Letters Patent.

Patented Dec. 2& t91t5.

.hpplication fiIedJ'une 1, 1915. Serial No. 31,321.

for street lighting, and replacedin such holders as occasion for the removal; and re placement occurs,.the device, moreover, comprising means for illumination at .its working or lamp engaging en'dforffa'cilitating the work of the persoirtaking down or replacing the lamps.

The invention is described; in conjunction with the-accompanying drawings and} is set forth in the claims.

In the drawings Figure 1 is a side jelevation showing the device. as havingthe jaws thereof closed and held closed, in theirembrace of a socket for an incandescent elec tric lamp, which lamp, and thesocket therefor is to be withdrawn from the elevated holder therefor or. inserted in such holder. Fig; 2 is a similar elevation but showing the jaws opened and the jaw operatingmeans in correspondingly changed "positions. Fig. 3.is a. sectional elevation astak'en oniline 3 3, Fig.1.

In the drawings, Arepresents' a -tubular metallic holder having thewoo'den extension pole B, and: provided at its upper end with the aws C C' for' clamping aflarnp ora socket in which therlamp isrcarried. In the upwardly open end; of the 'holder 'A is mounted an incandescent electric lamp 7 D, the same being carriedin the i cup D fitted in the'holder and retained together'with the"bulls eye*D by the annularfianged screw ringD One terminal of this small incandescent electric '*lamp "is .carried through the .aXial stem or shankfwhi'le the other terminal, suitably insulated, is earried to connection with the" lamp 'containting cup D and is thereby 'in electrical-connection with the metallic tubular holder in -which the: lamp is set.

Erepresents a dry battery ofcyliridrical lower end of the holder.

tensionv pole has in the upper end thereof a central bore in which is fitted for free axial shape fitted in the tubular holder and having the exposed end or pole at the upper portion thereofdn connection, by contact with the central terminal of the lamp D.

flh is battery as usual in portable flashlights 1s incased in an insulating sheath so that the sides thereof form no electrical connection with the wall of the metallic tubular holder A; but the other pole or exposed end of the battery is open so as to beelectrically connected with the metallic tubular holder when the pole is connected with the latter. The

tubular. holder A has angular bayonetjoint slots (1 a-which open downwardly to the The wooden exmovementa plunger or stud b which hasa slot cZ- -1n an lntermediate part thereof; and

said plunger is outwardly or upwardly yieldinglyforced by the spring f. seated in the base of the bore in the pole. The upper endportion of the pole is encircled by a metallic ferruleg and a metallic pin it is passed transversely through the ferrule, the pole andthe slot in the plunger, andthe ends "thereof outwardly project so as to form I opposite studs or trunnions for effecting the bayonet joint connection of the pole with the :metallic tubular holder. hen the pole is placed in itsdetachable connection with the holder A, the circuitfor the little electric 'lamp.D is completed or closed, so that the current from the battery will pass by wa of the central terminal upwardly through the filament-and thence by the other terminal sidewise to the tubular metallic holder, and by the way of the pin (or the *ferrule andthe pin) to the plunger '2) and back to-the battery. Of course, when the pole is detached from the holder A, at times when the device is not in use, the circuit is broken, or opened, the lamp will not be illuminated, and the battery will not be'run down. "The jaws C Care by.v pivots i z hung in ear pieces of a yoke or collar'j afliXed on the upper end of the holder, saidjaws having downwardly extended and slightly divergent lever arms 7070 preferably provided with. small rollers 70. Thellower portions of the jaws C and their lever ertensions are made integrally as castings whlle the upper portions of the -ja'ws are made of paired -me1nbers'C ofspring wire, united-at their "upper ends by curved castingsC properly shaped to embrace and clamp the lamp or the socket in which the lamp is carried,a porcelain socket of the kind last referred to being represented by a; in Fig. 1. The por tions C of the jaws which are comprised in the pairs of wires are adjustably engaged through perforations in lugs m at the upper ends of the rigid lower portions of the jaws constituted by the castings and confined by the set screw 0. The jaws are, therefore, vertically extensible and contractible and by their adjustment the resiliency thereof may be increased or diminished.

The roller-provided lever arms 7c of the jaws C straddle a conical collar or tapered member G, which is slidable vertically on the upper end portion of the tubular metallic holder A. This conical collar when forced upwardly, by its impingement or cam action against the roller-provided lever arms of the jaws causes by the forcible spreading of the lever arms the closing of the jaws for the engagement of the lamp or the lamp socket. Below the horizontal widened base of the conical collar G the tubular holder is encircled by a collar or yoke t suitably fastened thereon and which yoke is provided with an outwardly extending pivot stud or trunnion Q on which is hung a lever L properly formed to operate the slidable conical collar. This lever comprises a portion M, which is curved eccentrically of the pivot from which the lever has its swinging motion; and it has an operating arm '0 by which when the arm is downwardly drawn, the lever is swung so that the eccentric in termediate curved or elbow portion forces the conical collar upwardly to the position shown in Fig. 1, which view represents the jaws in their closed position and also shows that they are held locked in such closed osition as the o eratim lever arm 1) is substantially on the line of the dead center when the most prominentportion of the curved elbow is at its highest point, and the parts being in the. position shown in Fig. 1, the lamp will be, and remain tightly clamped within the more or less yielding embrace of the spring aws, until purposely released and opened for the releasing and opening of the jaws, for the accomplishment of which the lever is made with the second arm to extended from the eccentrically curved elbow u at more or less nearly a right angle to the length of the operating 7 arm.

y represents a cord, chain or like flexible connection which may be secured to either of the lever arms according to the manner of use to which the device or implement is to be put.

Fig. 2 shows the device as open; and assuming that the work to be accomplished is the taking down of a lamp from an elevated support therefor the cord will have its attachment to the operating arm 0 of the lever; then when the jaws are brought to position to embrace the lamp the cord is drawn upon and the lever is swung to the position shown in Fig. l, effecting the clamping or gripping of the lamp so that it may be extracted, by downward pull on the pole, from the holder therefor.

When it is desired to put lamps up into the elevated holder or support therefor, the lamps while the device is lowered are clamped thereby by effecting the closing of the jaws as shown in Fig. 1, and the cord being attached to the releasing arm w of the lever, after the lamp or its socket is shoved upwardly through the medium of the pole into the holder, the arm to is through the pull of the cord downwardly swung to the position shown in Fig. 2, whereupon the conical collar will gravitatively lower and permit the jaws to open and release their clamping bind on the replaced lamp.

In many cases the lamp holders are obscured or shaded, by a hood and the illumination by the little electric lamp, in the upper end of the jaw carrying holder A, is an important and valuable assistance to the user of the device, and also permits the successful use thereof in the night time.

Various changes and modifications in the detailed construction of the device and parts thereof may be made within the scope of this invention and without sacrificing any of the advantages thereof.

I claim 1. In a device of the character described, a holder, provided with an extension pole having at its upper end portion opposite jaws pivotally mounted thereon, and extended above their pivotal points and. having lever'arms extending below their pivotal points, a conical collar vertically slidable on the holder and impinging between the lever arms of the jaws and operable to close the latter, and a swinging lever pivoted on the holder, adjacent the collar comprising a portion curved eccentrically of the pivot, and having an arm operable to swing the lever to cause the eccentric portion to impinge against and elevate the collar.

2. In a device of the character described, a holder, provided with an extension pole, having at its upper end portion opposite jaws pivotally mounted thereon, and extended above their pivotal points and having lever arms extending below their pivotal points, a conical collar vertically slidable on the holder and impinging between the lever arms of the jaws and operable to close the latter, and a swinging lever pivoted on the holder adjacent the collar, comprising a portion curved eccentrically of the pivot and having an arm operable to swing the lever for elevation of the collar and having an oppositely extended arm operable to re l J (i versely operate the lever for positioning the eccentrically curved portion so as to permit the lowering of the collar.

3. In a device of the character described, a holder, provided with an extension pole, having at its upper end portion opposite jaws pivotally mounted thereon, and extended above their pivotal points and having lever arms extending below their pivoted points, a conical collar vertically slidable on the holder and impinging between the lever arms of the jaws and operable to close the latter, a swinging lever pivoted on the holder adjacent the collar, comprising a portion curved eccentrically of the pivot and having an arm operable to swing the lever for elevation of the collar and having an oppositely extended arm operable to re versely operate the lever for positioning the eccentrically curved portion so as to permit the lowering of the collar, and a cord and means for connecting it with either of said lever arms.

4. In a device of the character described, a holder provided with jaws at and extending above its upper end portion, and means for operating said jaws, an electric lamp carried by the upper portion of the holder, a battery in the holder, a pole detachably connected with the holder, and means operable by the pole when connected with the holder for closing a circuit comprising the lamp and battery.

5. In a device of the character described, a tubular metallic holder, provided with jaws, and means for operating them, an electrio lamp within and exposed at the upper end of the holder and having an inwardly projecting terminal, and a terminal in con nection with the metallic holder, a battery in the holder in connection with the inwardly projecting terminal of the lamp, an extension pole and means for detachably connecting it with the holder, and means carried by said pole, which while the pole is connected with the holder forms connection between the latter and the battery.

6. In a device of the character described, a tubular metallic holder, provided with jaws, and means for operating them, and

Copies of this patent may be obtained for five cents each, by addressing the having at its lower portion an angular downwardly opening slot, an electric lamp within and exposed at the upper end of the holder and having an inwardly projecting terminal, and a terminal in connection with the metallic holder, a battery in the holder having its upper end in connection with the inwardly projecting terminal of the lamp, a wooden extension pole having a spring pressed plunger within, and extended above its upper end, which is provided with a slot in its intermediate part, a metallic pin passed through the pole and through the slot in the plunger and projecting outwardly beyond the side of the pole, serving as the member for engaging in the angular slot of the holder, and said plunger and the pin forming electric connection between the bat tery and the said metallic holder.

7. In a device of the character described, a tubular metallic holder, provided with jaws, and means for operating them, and having at its lower portion an angular downwardly opening slot, an electric lamp Within and exposed at the upper end of the holder and having an inwardly projecting terminal and a terminal in connection with the metallic holder, a battery in the holder having its upper end in connection with the inwardly projecting terminal of the lamp, a wooden extension pole having a spring pressed plunger within and extended above its upper end having a slot in its intermediate part, a metallic ferrule surrounding the upper end portion of the pole, a metallic pin passed through the ferrule-provided portion of the pole and through the slot in the plunger and projecting outwardly beyond the side of the pole, serving as the member for engaging in the angular slot of the holder, and said plunger, pin and ferrule forming electric connection between the battery and the said metallic holder.

Signed by me at Springfield, Mass, in presence of two subscribing witnesses.

ARTHUR W. DARBY.

Witnesses:

G. R. DRISCOLL, WM. S. BELLows.

\mmissioner of Patents,

Washington, D. G." 

